77400666 has 24 divisors (see below), whose sum is σ = 191659104. Its totient is φ = 22114440.

The previous prime is 77400641. The next prime is 77400671. The reversal of 77400666 is 66600477.

It is a self number, because there is not a number n which added to its sum of digits gives 77400666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 307020 + ... + 307271.

It is an arithmetic number, because the mean of its divisors is an integer number (7985796).

Almost surely, 2^77400666 is an apocalyptic number.

77400666 is an abundant number, since it is smaller than the sum of its proper divisors (114258438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77400666 is a wasteful number, since it uses less digits than its factorization.

77400666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614306 (or 614303 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 77400666 is about 8797.7648297735. The cubic root of 77400666 is about 426.1687158208.

The spelling of 77400666 in words is "seventy-seven million, four hundred thousand, six hundred sixty-six".